[Bug 195458] Hang on shutdown/root unmount after FreeBSD 10.1R upgrade

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=195458

elofu17 at hotmail.com changed:

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                 CC|                            |elofu17 at hotmail.com

--- Comment #26 from elofu17 at hotmail.com ---
I have no idea if this is related or not, but...


When I install FreeBSD 10.0 via an ILO/IPMI/KVM-mounted .iso image, the machine
usually hang in very much the same manner as described in this thread, just
when it is supposed to reboot.

The problem seem to be related with the USB system, which simply won't die, and
the machine will therefore never reboot itself.
(I guess the USB system is busy with my virtual CD/keyboard/mouse)

Workarounds:
press the reset-button, and the machine will reboot just fine...
or first set the sysctl hw.usb.no_shutdown_wait=1 before the installer reboot
the machine.



So if someone has a machine where the problem can *always* be reproduced, test
the sysctl command above just to see if the USB system is the real reason for
the hang and the subsequent dirty filesystem.

/Elof

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